Hurry Up, Houdini! (Magic Tree House, No. 50)
(Magic Tree House: Merlin Missions #22)
written by Mary Pope Osborne with illustrations by Sal Murdocca

• Publication Date: July 23, 2013
• Genres: Children's, Historical Fantasy
• Hardcover: 128 pages
• Publisher: Random House Books for Young Readers
• ISBN-10: 0307980456
• ISBN-13: 9780307980458